the most vibrant, noisy, an overcrowded city on earth, mumbai would be right up there. the contrasts and contradictions are striking. >> wow. a is 30-years old, businessman. they are thinking of upgrading. he went out on a test drive. >> the back and the front of this car looks the way it does with the lights. aside when they see you. that is a fantastic feeling to just accelerate. >> not everyone is able to live in mumbai's fast lane. all cities have their divisions between rich and poor. rarely do you see it in such an extreme form as you do in mumbai. there is no running water and sewage runs down the alleyway. this is nothing like as bad as it gets. one person describes this as a middle-class slum. where do you wash? >> this woman showed me around her 1-room house. this room is about 3 meters by 3 meters. it is home to five people. who lives here? you live here and your children? and your husband? and your mother-in-law? how do you all fit? it is very small. it is a tighte squeeze. they have got mats on the floor. >> i want to know what jobs you want to do when you